Drilling apparatus



June 23, 1936;

Lfw. GREVE ET AL DRILLING APPARATUS Filed Sept. 10, 1954- 5 Sheets-Sheet l 400/5 @eEvg JOHN 6. 60/9775 INVENTORS ATTORNEY June 23, 1936. w, 'GREVE AL 2,044,880

DRILLING APPARATUS Filed Sept. 10, 1934 5 Sheets-Sheet '2 J 23, 1936- 1.. w. GREVE ET AL 2,044,330

DRILLING APPARATUS Filed Sept. 10, 1954 5 Sheets-Sheet 3 g ilk- {'41 '7" f r a n 1 4 Z a m 5 W m H 2 n 5 i w any zou/s N. are v6; .JoHA/cQ cukms INVENTORS ATTORNEY June 23, 1936. L. w. GREVE ET AL 2,044,880

DRTLLTNG APPARATUS Filed Sept. 10, 1934 5 Sheets-Sheet 4 400/5 m at: v6 JOHN c. cwer/s INVENTOR5 ATTORNEY June 23,. 1936. L w E E ET AL 2,044,880

DRILLING APPARATUS Filed Sept. 10, 1954 S SheetS-Sheet 5 F g LOU/5 IVQEEVE g JOHN c, cuk r/s g INVENTORS ATTORNEY iii Patented June 23, 1936 UNITED STATES PATENT OFFICE DRILLING APPARATUS Louis W. Greve,

Cleveland, and John C. durtis,

Garfield Heights, Ohio, assignors to The Cleveland Rock Drill Company, Cleveland, Ohio, a

corporation of Ohio Application September 10, 1934, Serial No. 743,430 35 Claims. (01. 255-51) with a simple and efficient mechanism .for ele-- vating or lowering the drill guiding frame relatively to the supporting frame.

Another object of this invention is to provide a wagon drill with a mechanism capable of imparting rotation to the drill guiding frame relatively to the wheel supported frame on which the former is movably mounted.

Another object of this invention .is to provide a drilling apparatus of the wagon drill type with a mechanism whereby the drill guiding frame may be positioned inside or outside of the wheel supported frame.

Another objectof this invention is to provide a drilling apparatus of the aforesaid mentioned type with a mechanism whereby the driilguiding frame is capable of slidable movement relative to the wheel supported frame on which the former is movably mounted.

Other objects and advantages more or less ancillary to the foregoing and the manner in which the various objects are attained, reside in the specific construction and aggroupment of the elements peculiar to this structure, as will become apparent from a more complete examination of this specification, in the claims of which there are assembled certain specific combinations of parts and specific constructions indicative of' the scope and spirit of the invention.

in the drawings which illustrate the invention: Fig. 1 is a side elevational view of the wagon drill illustrating the rock drill guiding frame in a vertical position.

Fig. 2 is an enlarged cross sectional view taken in a plane indicated by lines 22 in Fig. l.

Fig. 3 is a view similar to Fig. 1 illustrating the rock drill guiding frame in an inclined position. Fig. 4 is an enlarged side elevational view partly in section of the jack-screw shown in Fig. 3.

Figs. 5 and 6 are also views similar to Fig. 1 illustrating the rock drill receiving frame in different positions.

Fig. 7 is a. plan view of the wagon drill illustrating the rock drill guiding frame in the position shown in Fig. 1.

' in a plane indicated Fig. 8 is a view similar to Fig. 7 illustrating the rock drill guiding frame in another position.

Fig. 9 is a rear end elevational view of the wagon drill, the rock drill guiding frame being shown in an inclined position.

Fig. 10 is an enlarged cross sectional view taken by line Iii-l0 in Fig. 9.

Fig. 11 is also an enlarged cross sectional view taken in a plane indicated by line I l-i i in Fig. 7.

Referring to the drawings in which like symbols designate corresponding parts throughout the several views, represents the supporting frame or wagon comprising two side channel bars 2| and 22 united at one end by a casting or bracket 23, which is secured thereto by means of bolts 24. The bracket 23 is properly machined to rotatably receive the shafted portion 25 of a U-shaped bracket 28 depending therefrom. Extending through the end portion of the parallel arms of the bracket 26, there is a shaft 21 having. rotatably mounted thereon a wheel 28, which is held in spaced relation with the inside of the bracket by the hub of the former engaging the latter. The end portions of the shaft 21 protrude sufficiently from the bracket 26 to receive a steering handle 29 disposed in straddle relation with the wheel 28 and secured to the shaft 21 by means of cotter pins 30.

Secured to the lower side of the other end portion of each of the channel bars 2| and 22 by bolts 3i, there is a casting 32 having a shaft 33 extending therefrom to the exterior of the channel bars, and adapted to rotatably receive a wheel 34. Similarly secured to the inner side of each of the channel bars 2! and 22 above the casting 32, there is another casting having the internal vertical wall thereof formed with a circular T-shaped groove 36, within which are slidably mounted two bolts 31. Located between the side members 2i and 22, there is a supporting shaft or yoke 38, comprising a tubular member 39 having welded thereto at each end thereof an arm 40 formed with two apertures properly located to receive the bolts 31. which extends from the groove 36. Each of the bolts 31 extend sufliciently from the arm 40 to receive a nut 4 I, by which the yoke 38 may be secured to the stationary castings 32 in any desired position. The tubular member 39 is formed with a longitudinally disposed key slot 42 extending the full length thereof, the purpose of which will be explained later.

Slidably and rotatably mounted on the tubular member 39 of the yoke 38, there is a casing 43 formed with a clamping device comprising a laterally disposed slotted lug 44 having a bolt 45 therethrough adapted ayifeceive a nut 46, by

which the upper and the" lower portion of the lug 44 may be brought toward each other for clamping the casing 48 on the tubular member 39. Toward one end, the casing 43 is formed with an internal chamber 41, adapted to accommodate a. worm gear 88 having a key 48 slidable within the key slot 82 formed on the tubular member 88 on which the worm gear 48 is mounted. Transversely disposed within the chamber 41 in rotatable interengagement with the teeth of the worm gear 48, there is a worm 58 having each of its end portions accurately machined for close fit rotatable engagement within a nut 6| screwed within the casing 48. The free end 52 of each of said portions extends to the exterior of the casing, and is properly machined to receive a wrench or handle by which the worm screw may be rotated. The chamber 41 is closed from the exterior by a cover 53 secured to the ;casing by'means of bolts 54. The upper external jwall of the casing 63 is provided with a counterbore, and a concentrically disposed T-shaped circular groove 88 having slidable therein, the heads of two bolts 51. Rotatably mounted on this upper race of the casing 88, there is a housing 58 provided with a stem I89 depending therefrom into the counterbore 58. The housing 68 is formed with a flange formed with two apertures adapted to receive the bolts 51, which extend sufilciently therefrom to receive the nuts 59 by which the housing 58 maybe secured to the casing 48 against rotation. The upper portion of the housing 68 is accurately bored to receive a bar 68 rotatable and slidable therein, which may be clamped therein by means of a clamping device comprising a. laterally extending slotted lug 6| having a bolt 62 therethrough adapted to receive a nut 68. Toward one end, the housing 68 is also formed with an internal chamber 64 having a worm gear 65 rotatable therein. This worm is also provided with a key 66 slidable within a key slot 61 longitudinally disposed within the bar 68. Transverselydisposed within thechamber 68, there is a worm 88 having the teeth thereof in interengagement with the teeth of the worm gear 65. Each of the end portions of the worm 68 is also accurately machined for close fit rotatable engagement within a nut 88 screwed within the housing 58, while the free end 18 of each of said end portions extends from the nut 66, and is properly machined to receive a wrench by which the worm 68 may be rotated. The chamber 64 is also closed by a cover 16 secured to the housing 58 by bolts F2. The bar 88 is bent toponstitute a relatively short arm 38 integral with the bar 88, but disposed at right angle therewith.

Detachably secured to the arm 18, there is a rock drill guiding frame comprising a tube 14 having affixed to each end thereof a head I5 secured thereto by long bolts or side rods 16. The portion of each head "it protruding from the tube is elongated to extend laterally past the marginal edge of the tube, and is formed with a semi-circular groove 11 adapted for engagement over the arm 13. Corresponding to the portion'of the head engageable with the arm. 13, there is a cap 88 also formed with four apertured lugs 8i through which the bolts 18 are free to pass to receive the nuts 82, by which the rock drill guiding frame it may be secured to the arm 13.

Extending the full length of the tube 14, there are two parallel guides 83 secured thereto by bolts 88. These guides are adapted to receive a rock drill 85, which is slidably mounted therein.

Located in the interior or the tube 14, there is a fluid actuated feeding mechanism capable of transmitting feeding motion to the rock drill by means of a chain 86, which is connected to a support or slabback 81 on which the rock drill 85 is rigidly secured by clamps 88. Since the feeding mechanism does not constitute a part of the present invention, no description of the same is thought necessary.

The other end portion of the bar 68 is formed with a transversally disposed slot 89 having bolted therein in oflfset relation with the bar 68 a U- shaped bracket 68 which extends from the bar 68 in parallel alignment with the small arm 13. Pivotally secured to the bracket 98 by a bolt 9I extending therethough, there is a cross tube 82 having welded thereon at right angle therewith a tubular member 88 having the end portion thereof, away from the cross member 82, properly machined to receive a casing 84, which is secured thereto by a clamp 88. Leading from the casing 84 to each of the sidearms of the U-shaped bracket 98, there is a brace 86. The casing 84 is properly machined to rotatably receive a worm gear 81 provided with a screw threaded bore 88 adapted to receive a screw 98. The worm gear or nut 91 is locked against longitudinal movement in one direction by the casing 84 overlapping one end of the former, and in the other direction by a. thrust ball hearing I 88 secured within the tubular member 83. Adjacent the worm gear 91, the casing 94 is formed with a chamber accommo dating a worm I8I having the teeth thereof en gaging the teeth of the worm gear 91. The worm IIII is locked against accidental removal from the casing 84 by a nut I82, and is provided with a portion I88 protruding from the casing 94 and formed to receive a wrench by which the worm may be rotated. The end of the screw 88 protruding from the casing 94 is pivotally mounted by a bolt I84 to a bracket I85 which is detachably secured to the side rods 16 by clamps I88. Limiting the travel of the screw 98 out of the nut 81, there is a washer I81 which is mounted on the end of the screw within the tubular member 88, and is secured thereon by a nut I88.

With the present construction, since the frame 28 is supported by the wheels 34 and 28, it will be understood that the entire drilling apparatus may readily be moved about without diihculty. When it is desired to drill a vertical hole in a ground or rock having a relatively smooth and horizontal surface, the drilling apparatus may be positioned as illustrated in Fig. 1, and the drilling operation may take place after the wheels 84 have been blocked to prevent any possible movement of the drilling apparatus relative to the hole being drilled. In quarry work, it is often necessary to drill a series 01' vertical holes in longitudinal alignment with the supported frame. Heretofore, this was accomplished by removing the blocks from the wheels 34 after the drilling of each hole, and moving the entire drilling apparatus or wagon drill a distance equal to the desired space wanted between the holes. With the present construction, a certain number of holes may be drilled in longitudinal alignment without necessitating the moving of the frame 28. Referring to Fig. 1, it will be seen that the yoke 38 comprising the tubular member 38 on which the guiding frame 14 is mounted, could be rotated, by loosening the bolts 31, and positioned at from the position shown in Fig. 1. The bar 68, by loosening the nut 46 of the clamp 44, could also be moved toward the left until the bracket 90 touches the housing 0, thus positioning the drill guiding frame I4 and consequently the rock drill 85 ahead of the left end of the frame 20. After the drilling of one hole, the drill guiding frame H, may be moved toward the right by simply sliding the bar 60 through the casing 43. In this instance, the angular movement of the guiding frame H is prevented by the key 48 engaging the slot at, the worm gear 48 being locked against rotation by the worm 50 engaging the latter, thus affording a guiding mechanism permitting the holes to be drilled in perfect alignment. When the bar 60 has been moved to its extreme rightward position, the yoke 38 may be swung around and positioned as illustrated in Fig. l. Thereafter the bar 60 may again be moved to the left until the bracket 90 engages the casing 43, and the drilling may be resumed by sliding the bar 60 to right after the drilling of each hole until the bar 60 reaches the end of its rightward travel, thus permitting the drilling of a series of holes in longitudinal alignment with the wagon drill, without necessitating the moving of the drilling apparatus after the drilling of each hole. By loosening the nuts 58 which secure the housing 58 to the casing 43, the bar Bil, and consequently the guiding frame 14 and screw jack 83 may be swung in any desired angular relation with the frame 20. Since the bar BI and its supporting housing 58 is rotatably mounted on the yoke 38, it will be understood that it is possible to drill a series of holes in perfect alignment and in any angular relation with the frame 20. For instance when a series of holes isdesired to be drilled parallel with the shafts 33 of the wheels 34, the bar 60 may be positioned as illustrated in Fig. 8, permitting thereby the drilling of a certain number of holes outside of the frame 20. If the drilling of the holes is intended to extend from the outside to the inside of the frame 20, or from one side of 'thelatter to the other side thereof, the yoke 3H may be swung toward the left, thus positioning the guiding frame I4 ahead of the wheels 34. In this instance, the casing 43 may be slid toward the channel bar 2| on the tubular member 39 of the yoke 38, by loosening the nuts 6 of the clamping bolt 45. Similarly the bar Bil may be slid through the housing 58 by loosening the nut 63 of the clamping bolt 62, thus positioning the guiding frame well outside of the frame 20. After the drilling of each hole, the casing 43 may he slid toward the channel bar 22 on the yoke 38 until the former touches the arm til. Subsequently the bar 60 may be moved similarly through the housing 58, aifording thereby a relatively long lateral movement of the guiding frame relative to the frame 20. The alignment of the holes is constantly assured by theengagement of the key 49 within the slot t2 disposed on the tubular member 39 of the yoke 38, or by the similar engagement of the key 66 within the slot 6? formed on the bar 60. It will be understood that while the guiding frame is thus capable of slidable movement, it may also be revolved around the center axis of the stem I09 rotatably mounted within the coun' ter-bore 55 illustrated in Fig. 2. By loosening the nuts 59 of the bolts 57 slidably mounted within the annular groove 56, it is possible to drill a series of holes in a circular disposition, the extent of the radius of the circle being equal to the distance between the center axis of the rock drill 85 and that of the stem Hi9. This radius may be varied by sliding the bar til through the housing as previously explained.

Through the medium of the screw jack 93, it is possible to lower or elevate the guiding frame l4 relatively to the frame 20. In this instance, it is first necessary to loosen the nuts 82 to permit a free rotation of the head II, which is secured to the end of the guiding frame 14, on the arms 13 of the bar 80. Subsequently the worm I0 I may be rotated, thus causing the rotation of the worm gear or nut 91, and the consequential longitudinal movement of the screw 99. In this manner, the guiding frame I4 may be moved from one of its extreme positions shown in Fig. 5, to a position well beyond the vertical. The screw 99 is of a length calculated to permit the guiding frame 14 to be moved in any desired position within an arc of about When it is desired to raise the guiding frame H in 'a vertical position as shown in Fig. 1. the worm I ll may be rotated until the screw 98 has reached the extreme end of its travel, or until the washer Ill engages the ball bearing I00. Subsequently the nuts 82 of the bolts I9 may be tightened for rigidly securing the guiding frame H on the arm I! of the bar 60. Thereafter the clamps I06 may be loosened from the side rods 16, permitting thereby the slidable movement of the bracket I05 on the guiding frame it when the worm IIH is rotated in an adverse direction to retract the screw 99. When the screw is again at the end of its inward travel, the clamps I06 may again be tightened and the nut 82 be loosened, thus permitting a further movement of the guid- 'ing frame H when the worm iili is rotated to cause the outward longitudinal movement of the screw. By reason of the possible slidable movement of the clamp or bracket we on the guiding frame 14, it will now be understood that the guiding frame may be rotated within an arc which is greater than that rendered possible by the screw 99. When the guiding frame is loosened in any of the aforesaid angular positions, it is understood that the bar 80 is still slidable within the housing 58, as previously explained, by loosening the clamps 6|. For instance, when the drill guiding frame is positioned as illustrated in Fig. 6, it

is possible to drill a vertical line of holes by simply sliding the bar 60 through the housing 58, the a ignment of the holes being assured by the engagement of the key at within the slot El formed on the bar 60.

When the nut 45 of the clamping bolt 45 is loosened to permit the slidable movement of the casing 43 on the yoke 33 or tubular member 39 as previously mentioned, the casing 43 may be ro tated on the tubular member 39 by simply rotating the worm 50. Since the worm gear M3 is held against rotation relative to the tubular member 39 due to the engagement of the key 49 within the slot 42, the rotation of the worm 5!! will cause the latter to revolve around the worm gear it, thus causing the consequential rotation of the housing 43 together with the bar Bi! and the guiding frame H around the tubular member 39 of the yoke 33. In this manner, it will be seen that the angular position of the guiding frame 74 relative to the frame 20, may be altered without resorting to the screw jack 93, permitting thereby a quick angular adjustment of the guiding frame l4, irrespective of the clamping engagement of the latter on the arm is.

The angular position of the guiding frame M in a sidelong direction may be varied by rotating the worm 68 shown in Fig. 11. The worm gear 65 being connected to the bar w by the key 66 engaging the slot 61, the rotation of the former will be transmitted to the bar Cl and consequently to the guiding frame 14, thus permitting the latter to be positioned as illustrated in Fig. 9. With the present construction, it will be understood that when' the yoke 38 is located ahead of the wheels 34, the guiding frame 14 may be rotated from one side of the frame to the other side thereof; the rotation of the guiding frame ll in a lateral plane being only limited by the engagement of the free end thereof with the ground.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modification of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

, 1. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising a supporting frame, a substantially U-shaped cross member pivotally connected to said frame, an arm movably secured to said member, a drill guiding frame mounted on said arm, and means for establishing a rigid connection between said frames in: any position assumed by said drill guiding frame by virtue of the pivotal connection of said member with said supporting frame and by virtue of the movement of said arm relative to said member.

2. In a drilling apparatus, a mechanism for sup- ..porting and guiding a drill comprising a supporting frame, a substantially U-shaped cross member pivotally connected to said frame, an element secured to said cross member capable of revolving around the longitudinal axis thereof and of rotating on an axis normal to said longitudinal axis, a drill guiding frame pivotally connected to said element, and means for securing said drill guiding frame in any position possible by virtue of the revolving and rotating movements of said element and by virtue of said pivotal connections.

:3. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a tool supporting member pivotally connected to said carrying frame, an element carried by said member capable of slidable movement relative thereto, a drill guiding frame supported by said element on an axis parallel to the pivotal axis of said member, one end of said drill guiding frame being capable of movement through the open portion of the carrying frame due to the pivotal movement of said member, said drill guiding frame being adjustable longitudinally of said carrying frame by the slidable movement of said element, and means for locking the two frames against relative movement.

4. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, 'a tool supporting member pivotally connected to said carrying frame, an element carried by said member capable of slidable movement relative thereto, a drill guiding frame supported by said element, one end of said drill guiding frame being capable of movement through the open portion of the carrying frame due to the pivotal movement of said member, said drill guiding frame being adjustable transversally of said carrying frame from the interior to the exterior of the marginal edge thereof by the slidable movement I means for locking the of said element, and means for locking the two frames against relative movement.

5. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a cross member carried by said frame extending through the open portion of the latter, an element carried by said cross member capable of rotatable and slidable movement relative thereto, a drill guiding frame pivotally connected to said element, one end of said drill guiding frame being capable of universal movement through the open portion of said carrying frame due to its Pivotal connection with said element and the rotatable and slidable movement' of the latter, and two frames against relative movement.

6. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a tool supporting member pivotally connected to said carrying frame, an element carried by said member capable of rotation relative thereto in a plane substantially parallel to said carrying frame, a drill guiding frame supported by said element, one end of said drill guiding frame being normally capable of movement through the open portion of the carrying frame due to the pivotal movement of said member, said drill guiding frame being movable from the interior to the exterior of the marginal edge of said carrying frame due to the rotation of said element, and means for locking the two frames against relative movement.

7. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a tool supporting member pivotally connected to said carrying frame, an element carried by said member capable of pivotal movement relative thereto in a plane substantially parallel to said carrying frame, a drill guiding frame supported by said element, one end of said drill guiding frame being normally capable of movement through the open portion of the carrying frame due to the pivotal movement of said memher, said drill guiding frame being movable from one to the other of said side members due to the pivotal movement of said element, and means for locking the two frames against relative movement.

8. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a tool supporting member pivotally connected to said carrying frame and extending through said open portion, an element carried by said memberextending to the exterior of the marginal edge of said carrying frame, said element being capable of rotation on its own axis, a drill guiding frame supported by said element in the exterior of the marginal edge of the carrying frame, said drill guiding frame being elevated or lowered relative to said carrying frame due to the pivotal, movement of said member and being pivotally movable in a longitudinal vertical plane due to the rotation of said element, and means for locking the two frames against relative movement.

9. In a portable drilling rig, the combination of a carrying frame having an open center, supporting means for said frame, a tool supporting frame pivotally connected to said carrying frame, a rock drill mechanism supported by said supporting frame on an axis normally parallel to the pivotal aoaasso axis of said supporting frame, a connecting mechanism between said supporting frame and said drilling mechanism, said drilling mechanismbeing normally capable of movement through the open center of the carrying frameby the pivotal movement of said supporting frame, and means included in said connecting mechanism whereby said drilling mechanism may be positioned outside of the marginal edge of said carrying frame while supported by said supporting frame.

10. In a portable drilling rig, a carrying frame, supporting means for said frame, a substantially U-shaped member pivotally connected to said carrying frame, an element carried by said member capable of longitudinal slidable movement rela-.v

tive thereto, a drill guiding frame detachably secured to said element, and means for establishing a rigid connection between the two frames in any position assumed by the drill guiding frame by virtue of the pivotal connection of the U-s'haped member with the carrying frame and the slidable i movement of said element.

11. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising a supporting frame, an arm slidably secured to said frame in transversal relation therewith, a drill guiding frame having one end pivotally connected to said arm, means responsive to the slidable movement of said arm for moving said drill guiding frame while in a vertical position from the inside to the outside of the marginal edge of said supporting frame, and means forlocking said drill guiding frame to said arm in different positions possible by virtue of its pivotal connection therewith and irrespective of its location relative to said supporting frame.

12. In a drilling apparatus, a mechanism. for supporting and guiding a drill comprising a supporting frame, a member carried by said frame capable of slidable and rotatable movement relative thereto, said member being formed with an offset portion, a drill guiding frame having one end thereof pivotally connected to said offset portion, and means for establishing a rigid connection between. said frames in any position assumed by said drill guiding frame by virtue of the slidable and rotatable movement of said member and by virtue of the pivotal connection between said drill guiding frame and the offset portion of said member.

13. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising a supporting frame, a substantially arch-shaped member pivotally connected to said frame, an element carried by said member capable of slidable movement realtive thereto, a drill guiding frame detachably secured to said element, means for looking said element in elevated or lowered position i possible by virtue of the pivotal connection of said member, and means for locking said drill guiding frame in any position possible by virtue of the slidable movement of said element irrespective of the location of the latter in said elevated or lowered position,

14. In a drilling apparatus, a device for supporting and guiding a drill comprising a carrying frame, a U-shaped supporting frame pivotally connected to said carrying frame, a drill guiding frame movably supported by said supporting frame, amechanism associated with said drill guiding frame capable of elevating or lowering one end thereof relatively to said carrying frame, and means independent of said mechanism whereby the latter and said drill guiding frame may be rotated relative to said first mentioned frame onxan axis substantially parallel to the longitudinal centeraxis of saidcarrying frame.

15. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising supporting frame, a member carried thei eby'capable g of rotation relativejthereto on" an axis. substantialiy parallel to jth'e'"longitudinal.centergaxis of said supporting frame, a drillfr flme, s lack operatively connected to the latten i'and means for pivotally securing pne'end of, said drill in guiding frameand of said Jack to said? member. 16. In a drilling'apparatus, a mechanism for. pp rtin and gui l p sin a sup porting frame, a drill guidingframe and a ,ta'clr pivotally supported by said first mentioned frame; and a connection between said Jack and drill guiding frame affording the former to impart pivotal movement to the'latter, said connection' being adjustable on saiddrill guiding frame in a manner affording a pivotal movement of said drill guiding of a range materially greater than that normally possible by one complete operative travel of said Jack.

17. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising a sup- :5 porting frame, a drill guiding frame and a Jack J movably supported by said first mentioned frame, said Jack comprising a screw longitudinally movable through a rotatable nut, and a connection between said drilling guiding frame and one end 80 of said screw whereby the latter may be operatively connected to the former duringsuccessive complete travel of said screw in one direction irrespective of the travel thereof in the other direction, affording thereby a step by stepj pivotal 88 movement of said drill guiding frame arc of an extent materially greater than thatresulting from a single operative travel ofsaid screw.

18,1n a drilling apparatus, a mechanism for supporting and guiding a drill comprising a supporting frame, a cross member pivotally secured to said frame, an element mounted on said memher and capable of rotation relatively thereto, a drill guiding frame detachably secured to said element, and means capable of operation for alternatively imparting rotary movement tosaidt drill guiding frame around two axes disposed at right angles with each other, said means including a duality of rotation mechanisms one associated with said member and the other associated with said element.

19; In a drilling apparatus, a mechanism for supporting and guiding a drill comprising is supporting frame, an elongated frame having a drill slidably guided thereon, a substantially archshaped member capable of pivotal movement relative to said frame, and element carried by said member adapted to be elevated or lowered by virtue of the pivotal movement of said mqnber, said element being capable of slidable and 50 rotatable movement relative to said member, said elongated frame. being detachably secured to said element, the rotation of said element causing said elongated frame and drill to be moved in positions for drilling parallel holes in a substantially circular disposition, and means responsive to the slidable movement of said element for varying the diameter of the circle on which said holes may be drilled.

20. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising a supporting frame, a housing carried thereby, a member detachably secured to said housing, said housing and member being capable of rotatr .i in a transversal vertical plane relative to said supporting frame, a drill guiding frame attachable to said member in parallel alignment with said supporting frame, the rotation of said member causing said drill guiding frame to rotate around an axis substantially parallel to the longitudinal cenf'ter axis of said supporting frame while said drill guiding frame remains in said parallel alignment.

mainslocatedinsaidsubstantiallyhorisontal position.

'22.Inaportabledrillingrig,acarryingframe havinganopencenterportiomsupportingmeans for said frame, a substantially U-shaped tool supporting element having its legs pivotally connected to said'carrying frame, the space hethe pivotal connections being unobstructed,atoolreceivingarmconnectedtosaidsupporting elementfor radial movement-in a plane withinwhichsaidmemberispositionabledueto the pivotal movemmt-of said element, and means for establishing a rigid connection between said c rrying frame receiving arm.

23. In a portabledrilling a carrying frame including two side members having an open portion therebetweem' supporting means for said frame,atoolsupportingmemberconnectedto said frame for pivotal movement through the open portion thereof, an arm movably secured to said member, a drill guiding frame mounted on said arm, and means for establishing a rigid connection between said frames in any position assumedbysaiddrillguidingframsduetothe pivotal movement of said member and the movement of said am relative thereto.

24. In a portable drilling rig. the combination of a flat open center carrying frame, supporting means for said frame, a tool supporting frame pivotally connected to said carrying frame including an L-shaped element, a rock drilling mechanism connected to one arm of said L- shaped element for pivotal movement on an axis parallel to the pivotal axis of said tool supporting frame, one end of said drilling being capable of movement through the open center oi the carrying frame, said drilling mechanism being adjustable longitudinally of said carrying frame by the pivotal movement of the supporting frame, and means for locking the two frames against relative movement. v y

25. In a drilling apparatus, a mechanism for supporting and guidinga drill comprising a supporting frame, a substantially U-ehaped cross member connected to said frame for pivotal movement relative thereto, an arm movably secured to said member, a drill guiding frame pivotally movable on said arm, the pivotal axis of said drill guiding frame being adjustable angularly from a position parallel to the pivotal axis of said cross member due to the movement of said arm, and means for establishing a rigid connection between said frames in any position assumedbysaiddrillguidingframeduetothe movements aforesaid. v

36,.Inaportsbledrlllingrigafor of said carrying frame I amass supporting and guiding a drill comprising a car rying frame, a sectional drill supporting frame including a substantially U-shaped cross member pivotally connected to said carrying frame and an arm movably secured to said member, a drill mounted on said arm, and means for establishing a rigid connection between said frames in any position assumed by the drill by virtue of the pivotal connection of said member with said carryingframe and by virtue of the movement of said arm relative to said member.

2'7. In a portable drilling rig, a carrying frame includingtwo side members having an open portion therebetween, supporting means for said frame, a sectional tool supporting frame including a member pivotally connected to said carrying frame and an element carried by said member capable of slidshle movement relative thereto, a drilling mechanism supported by said supporting frame on an axis parallel to the pivotal axis of said member, one end of said drilling mechanism being capable of movement through the open portion of the carrying frame due to the pivotal movement of said member, said tool supporting frame being adjustable in length due to the slidable movement of said element, said drilling mechanism being adjustable longitudinally of said carrying frame due tothe adjustable length of .said tool supporting frame, and means for locking said frames against relative movement.

28. In a portable drilling rig, the combination of a carrying frame, supporting wheels carried by said frame, a substantially U-shaped member, means pivotally connecting said member to said carrying frame, an elongated element carried by said member, means movably connecting said element to said member, said member and element constituting a tool supporting frame having a drill guiding frame carried thereby, said pivotally .and movably connecting means including means for holding said tool supporting frame in adjusted position.

29. In a portable drilling rig, the combination of a carrying frame having an open center, supporting means for said frame, a tool supportim frame pivotally connected to said carrying frame, an element movably connected to said supporting frame, a rock drilling mechanism pivotally connected to said element, the pivotal axis of said drilling mechanism being movable from a position parallel to the pivotal axis of said supporting frame to a position out of parallel therewith due to the movement of said element relative to said supporting frame, one end of said drilling mechanism being capable of movement through the open center of the carrying frame, said drilling mechanism being adjustable longitudinally by the pivotal movement of the supporting frame, and means for locking the two frames against relative movement.

80. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a cross member carried by said frame capable of movement through the open portion of the latter, an L-shaped element movably carried by said cross member capable of pivotal movement and of rotation on an axis perpendicular to that of its pivotal axis, a drill guiding frame supported by said element, one end of said drill guiding frame being normally capable of movement through the open portion of the carrying frame due to the pivotal movement of said element, said drill guiding frame being movable from the interior to the exterior of the marginal edge of said carrying frame due to the rotation of said element, and means for locking the two frames against relative movement.

31. In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a tool supporting member pivotaliy con nected to said carrying frame, an element carried by said member capable of rotation relative thereto in a plane substantially parallel to said carrying frame, a drill guiding frame supported by said element, one end of said drill guiding frame being normally capable of movement through the open portion of the carrying frame due to the pivotal movement of said member, said drill guiding frame being movable from one side to the other side of said tool supporting member due to the rotation of said element, and means for locking the two frames against relative movement.

82, In a portable drilling rig, a carrying frame including two side members having an open portion therebetween, supporting means for said frame, a tool supporting member pivotally connected to said carrying fame, an element carried by said member capable of rotation relative thereto in a plane substantially parallel to said carrying frame, a drill guiding frame supported by said element, one end of said drill guiding frame being normally capable of movement through the open portion of the carrying frame due to the pivotal movement of said member, said drill guiding frame being arcually movable due to the rotation of said element, and means for locking the two frames against relative movement.

33. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising is supporting frame, an arm slidably secured to said frame in transversal relation therewith, a drill guiding frame having one end pivotally con-- nectedtooneendofsaldarm,abracepivotally ccnneetingsaiddrillguidingframetotheothet end of said arm and forming with said arm and drill guiding frame a substantially triangular structure, said structure being movable transversally of said supporting frame for positioning said drill guiding frame inside or outside of the 5 marginal edge of said supporting frame, said drill guiding frame being adjustable angularly with respect to said arm due to the pivotal connection therebetween, and means for locking said structure and supporting frame against relative 10 movement.

34. In a drilling apparatus, a mechanism for supporting and guiding a drill comprising a supporting frame, a substantially U-shaped cross member pivotally connected to said frame, an 15 arm movably secured to said member; a drill guiding frame mounted on one end of said arm,

a brace connecting said drill guiding frame to the other end of said arm and forming with said arm and drill guiding frame a substantially trito angular structure, and means for establishing a rigid connection between said supporting frame and structure in any position assumed by said structure by virtue of the pivotal connection of said member with said supporting frame and by 5 virtue of the movement of said arm relative to said member.

35. In a drilling apparatus. a device for supporting and guiding a drill comprising a supporting frame, an elongated element carried by 39 said frame in substantially parallel alignment therewith, a drill guiding frame pivotally connected to said element, a mechanism associated with said drill guiding frame and element for imparting pivotal movement to the former rela- 35 tive to the latter, said element being rotatable on its own axis and on an axis perpendicular thereto for electing the corresponding rotation of said drill guiding frame and mechanism, and means for locking said frames against relative moveso 

